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@N0 Mflel.) 2 Sheets-Smet 1.

F.- R, A. FRANKE. BRONZING MACHINE.

Patented Sept. 12, 1893.

we A (No Model.) 2 Sheets-Sheet 2.

- P. R. A. FRANKE.

110. 501,718. Patented sept. 12, 1893.

UNITED STATES FATENT Critics.

FRANZ RICHARD ALBREOHT FRANKE, OF BERLIN, GERMANY.

BRONZlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 504,718, dated September 12, 1893.

Application led April 24, 1893. SerialNo. 471.695. (No model.)

To @ZZ whom it may concern:

Be it known that I. FRANZ RICHARD AL- BRECHT FRANKE, a subject of the King of Prussia, residing at Berlin, Prussia, German Empire, have invented certain new and useful Improvements in Bronzing-Machiues, of which the following is hereby declared to be a full, clear, and exact specification.

The invention relates to devices employed for bronzing surfaces imprinted bytype, stereotype or lithograph plates or other means and consists of certain improvements in the apparatus, simple and cheap of structure, easily manipulated when in hand form and capable of effecting a clean and equal distribution of the bronze powder over the surface to be treated.

The exact nature of the invention will appear in detail from the description following and be pointed out by claims at its conclusion.

In the accompanying drawings like parts are designated by like letters throughout.

Figure l is a view in end elevation, of the apparatus as constructed for hand use. Fig. 2 is a cross section view on lines scof Fig. 3; Fig. 3, a top view with parts broken away.

A lower frame c and an upper frame b fitted together as shown and secured by hooks d or other expedient consitute a box-like structure to sustain the various machine parts. Journal-boxes g sliding in guides S at the slotted ends of the lower frame cserve to carry the distributing rolls c which bear upon the table or surface beneath. Reaction springs f located between the boxes g and the frameend tend to force the two parallel rolls c upward and snugly against the face of the feed-roll 7L which stands in intermediate relation thereto. The rolls e are furnished with an india-rubber or other yielding elastic jacket (e. g. gelatine compound) and receive and distribute the bronze powder as the saine is delivered from the feed-roll h above. Said roll h may be of hard-wood or other proper material and has a series of groove-like pockets encircling the roll at even distance and extending from end to end along its periphery. The ends of the upper frame l) are cut away and notched to conveniently receive the journals 'L' for the feed-roll h, said roll being heldin place through contact with the disn tribnting rolls e under play of the springsf. By this expedient the feed-roll h is driven frictionally on rotating the lower rolls e and thereupon delivers in even fashion the bronze which has been deposited within the pockets of said feedroll.

At its top the upper frame b affords a hopper-like receptacle for the bronze, said hopper having straight ends and sloping sides which latter extend lengthwise of the feedroll h. A sliding cover Z of glass or the like closes the hopper and prevents the dust from flying. The faces of the hopper are lined with felt although in preferred practice metal clips q slotted and adj ustably held, as by set screws t, at the sides of the hopper carry strips u of felt or bristles which project stoutly against the feed-roll h to govern the escape of the bronze so that it shall pass only by the pockets or grooves of roll h. Ordinarily, the ends of said roll abut against the ends of frame b while the felt lining at the hopper ends overlies the joint and tits nicely to its companion lining or clamp-plate at the hopper sides, by which provision the bronze has no vent except into the roll-pockets and so on past the projecting edge of the felt or bristle guard impinging against said roll. Manifestly the metal clips q permit the guardstrips to be readj usted or replaced as maybe necessary. The two frames b c can be separated if desired to gain access to the inclosed rolls and when this occurs the roll h is still in position to close the outlet from the hopper so that no loss of bronze ensues. At opposite edges, the lower frame c carries the fringe of brushes 7c, the front one of which as the apparatus is advanced acts to clear otf the dust or dirt while the rear one evenly lays the bronze that may have been deposited irregularly or excessively by the distributing roll.

It' used as a hand implement, the top of the hopper is properly shaped to allow for easy grasp by the operator.

The details of structure can be varied according to the skill of the mechanic without departing from the spirit of the invention.

What I claim as new, and desire to secure by Letters Patent, is-n l. The combination with the upper frame having a hopper and a grooved feedroll to IOO close the hopper-mouth, of a separable lower frame having a pair of smooth distributing rolls projecting beneath it and in contact above with said feed-roll, substantially as described.

2. The combination with the traveling box having a hopper above and a pair. of distributing rolls projecting beneath said box, of the intermediate grooved feed-roll closing the hopper-mouth and in contact with said distributing rolls, substantially as described.

3. The combination with a traveling box having a hopper above and a pair of distrib-y uting rolls projecting beneath said` boxA of the intermediate grooved feed-roll mounted below the hopper mouth and in contact with said distributing rolls and the flexible guards at the hopper sides impinging against said feed-roll, substantially as described.

4. The combination with the traveling box comprising upper and lower separable frames the latter provided with fringe brushes at its sides of the pairof distributing rolls projecting elastically beneath said lower frame, the hopper carried by the upper frame, the intermediate grooved feed-roll mounted below the hopper mouth and in contact with said distributing rolls and the flexible guards at the hopper side impinging against said feed-roll, substantially as described.

FRANZ RICHARD ALBRECHT FRANKE.

Witnesses:

ALBERT` LAvY, GEORG J. METZ. 

